ASRock C70M1 R2.0 User Manual - Page 17

Serial port Header

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Though this motherboard provides 24-pin ATX power connector, 12 24 it can still work if you adopt a traditional 20-pin ATX power supply. To use the 20-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 13. 20-Pin ATX Power Supply Installation 1 13 Serial port Header (9-pin COM1) (see p.8 No. 22) RRXD1 DDTR#1 DDSR#1 CCTS#1 1 RRI#1 RRTS#1 GND TTXD1 DDCD#1 Chassis Intrusion Header (2-pin CI1) (see p.8 No. 14) 1 GND Signal This COM1 header supports a serial port module. This motherboard supports CASE OPEN detection feature that detects if the chassis cover has been removed. This feature requires a chassis with chassis intrusion detection design. 17

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17
20-Pin ATX Power Supply Installation
Though this motherboard provides 24-pin ATX power connector,
it can still work if you adopt a traditional 20-pin ATX power supply.
To use the 20-pin ATX power supply, please plug your
power supply along with Pin 1 and Pin 13.
12
1
24
13
CCTS#1
RRTS#1
DDSR#1
DDTR#1
RRXD1
GND
TTXD1
DDCD#1
1
RRI#1
Serial port Header
This COM1 header supports a
(9-pin COM1)
serial port module.
(see p.8
No. 22)
Chassis Intrusion Header
This motherboard supports
(2-pin C±1)
CASE OPEN detection feature
(see p.8
No. 14)
that detects if the chassis cover
has been removed. This feature
requires a chassis with chassis
intrusion detection design.
1
Signal
GND